Police said a Northbrook man interrupted a car burglary crew in the act Thursday morning, though no one was caught in the incident.

Northbrook police said that just after 5 a.m. Thursday, a resident of the 1000 block of Dell Road called 911, saying he saw five or six men rummaging through parked cars. Police said that after calling, the man headed out to see the condition of his own car, and the thieves bolted for several vehicles he assumed they brought there. Before the burglars could get to an idling 2014 GMC pickup truck, the man grabbed the keys and held them for arriving officers, according to police. The pickup turned out to have been recently stolen in Morton Grove, police said.

Authorities said at least nine cars had been burglarized that morning on the 1000 and 1200 blocks of Dell, the 1900 block of Redwood Lane, the 1900 block of Kiest Road, the 800 block of Laurel Road and the 1100 block of Cedar Lane, not including most of the cars on the 1000 block of Dell. Most of the cars were reported to have been unlocked, officials said.